Joseph T. Nall Report - Aircraft Owners and Pilots Association

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Pilot Involvement Preflight/Taxi Takeoff/Climb Fuel Mismanagement Other Cruise Descent/Approach Go-Around Maneuvering 16 Weather Landing Other Proportion of Accidents Attributed to Flight Instruction Proportion of Flying 8.9% (4) 0.0% (0) 10.6% (31) 2.1% (1) 2.8% (1) 3.7% (1) 12.1% (8) 0.0% (0) 3.6% (1) 0.0% (0) 11.0% (14) 2.4% (1) 6.3% (8) 6.3% (4) 21.6% (8) 0.0% (0) 28.6% (4) 25.0% (2) All Accidents Fatal Accidents 23.8% (112) 42.9% (3) 0 10 20 30 40 50 Percent INSTRUCTIONAL FLYING 191 TOTAL/12 FATAL The proportion of total accidents attributed to instructional flying was almost unchanged in accidents in 1999 over the previous year. Flight training accounted for 13.8 percent of the accidents in 1999 as compared to 13.4 percent in 1998. The proportion of fatal accidents suffered during instructional flights also remained virtually unchanged with 5.6 percent in 1998 and 5.3 percent in 1999. These figures are still well below the 17.9 percent of the flying done for instructional purposes in 1998 (the most recent estimate available—see table on page 14). While it is difficult to make meaningful generalizations with a small number of accidents, some interesting facts are worth mentioning. ◗ The total number of accidents attributable to instructional flying increased by 3.8 percent in 1999 compared to the previous year’s figures (225 vs. 234). ◗ Pilot-related instructional accidents increased by 9.8 percent between 1998 and 1999 (174 in 1998 vs. 191 in 1999). ◗ Landing accidents in instructional flights increased by 27.3 percent in 1999 (88 vs. 112). Three of these accidents resulted in fatal injuries as opposed to only one in 1998. ◗ Accidents in takeoff and initial climb decreased by 20.5 percent (39 in 1998 vs. 31 in 1999). Only one of these was fatal, compared to two in 1998. Other common GA accident producers, maneuvering flight, weather, and fuel mismanagement, continued at low levels in instructional flying compared to GA operations as a whole. ◗ Maneuvering accidents during instructional flights resulted in eight accidents in both years, with two fatal in 1998 and four in 1999. ◗ Weather encounters resulted in only one instructional dual flight accident in 1999, which was fatal. In 1998, there were two weatherrelated instructional accidents, neither of which was fatal. ◗ Fuel mismanagement accidents doubled in 1999; however, the numbers were still small (four in 1998 vs. eight in 1999). Six of the 1999 accidents were dual flights, while two were solos. None of these accidents were fatal in 1999, while one resulted in fatalities in 1998.
Pilot Involvement MECHANICAL/ MAINTENANCE 256 TOTAL/27 FATAL Mechanical/maintenance accidents accounted for 15 percent of all accidents and 8.4 percent of fatal accidents. By far, the largest percentage of these accidents was the result of powerplant or propeller problems (44.5 percent of all mechanical/ maintenance accidents and 48.1 percent of fatal mechanical/maintenance accidents). In addition, another 74 accidents were classified as “power malfunction/loss for unknown reasons.” The investigations for 27 of these accidents were still in “preliminary” status when this report was compiled. Thus, the final count of mechanical/maintenance problems may change slightly when the final reports are in. Pilots should note that several of the mechanical failure accidents could have been prevented by a thorough preflight. Other accidents resulted when pilots incorrectly performed procedures after system failures occurred. Engine/Propeller Landing Gear/ Brakes Fuel System Controls/Airframe Electrical/Ignition Oil System Vacuum System/ Instruments Percent 16 12 Mechanical/Maintenance Accidents 5.5% (14) 3.7% (1) 4.7% (12) 3.7% (1) 12.1% (31) 3.7% (1) 1.6% (4) 11.1% (3) 21.9% (56) 0.0% (0) 9.8% (25) 29.6% (8) All Accidents Fatal Accidents 0 10 20 30 40 50 Percent Mechanical Accidents 15.6% 14.1% 14.1% 15.0% 44.5% (114) 48.1% (13) 8 4 0 1996 1997 1998 1999 G ENERAL AVIATION A CCIDENTS Major Cause All Accidents Fatal Accidents Pilot 73.1% 68.1% Mechanical/Maintenance 15.0% 8.4% Other 7.5% 8.8% Unknown 4.4% 14.7% Total 1,701 320 17
Page 2 and 3: Dedication Joseph T. Nall The Josep
Page 4 and 5: Overview E X E C U T I V E 4 Genera
Page 6 and 7: Analysis Analysis I NTERPRETING AVI
Page 8 and 9: Overview 15 12 9 6 3 0 1974 1979 A
Page 10 and 11: Overview 10 Percent 80 70.5% 60 40
Page 12 and 13: M Causes A J O R A and Factors C C
Page 14 and 15: Pilot Involvement Preflight/Taxi Ta
Page 18 and 19: Accident F Factors A T A L Percent
Page 20 and 21: Accident F Factors A T A L VFR in I
Page 22 and 23: Accident F Factors A T A L Improper
Page 24 and 25: Accident O Factors T H E R Percent
Page 26 and 27: Homebuilt Aircraft Preflight/Taxi 4
Page 28 and 29: Questions F R E Q U E N T L Y A S K
Page 30 and 31: Definitions N T S B Aerial Applicat
Page 32: AOPA Air Safety Foundation 421 Avia

Joseph T. Nall Report - Aircraft Owners and Pilots Association

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